IR3865MPBF

7

8/8/2012 Rev3.1

TYPICAL OPERATING DATA

Tested with demoboard shown in Figure 7, VIN = 12V, VCC = 5V, VOUT = 1.05V, Fs = 300kHz, T

airflow, unless otherwise specified

Figure 3. Switching Frequency vs.

Load Current

Figure 1. Efficiency vs. Load Current for

VOUT = 1.05V

Figure 2. Efficiency vs. Load Current for

VIN = 12V

Figure 4. R

Figure 5. Load Regulation

Figure 6. Line Regulation at I

0

50

100

150

200

250

300

350

0

2

4

6

8

10

Load Current (A)

45%

50%

55%

60%

65%

70%

75%

80%

85%

90%

95%

0.01

0.1

1

10

Load Current (A)

12VIN

7VIN

16VIN

50%

55%

60%

65%

70%

75%

80%

85%

90%

95%

0.01

0.1

1

10

Load Current (A)

VOUT = 1.05V; L = 1.5uH, 3.8mΩ

VOUT = 1.5V; L = 2.2uH, 6.0mΩ

VOUT = 3.3V; L = 3.3uH, 10.8mΩ

1.045

1.050

1.055

1.060

1.065

1.070

1.075

0

1

2

3

4

5

6

7

8

9

10

Load Current (A)

12VIN

7VIN

16VIN

1.045

1.050

1.055

1.060

1.065

1.070

1.075

7

8

9

10

11

12

13

14

15

16

Input Voltage (V)

0

200

400

600

800

1000

1200

1400

200 250 300 350 400 450 500 550 600 650 700 750

Switching Frequency (kHz)

5.0 Vout

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5